The correct answer is: A. OCR
OCR stands for Optical Character Recognition. It is a technology that converts images of text into machine-readable text. This can be done with a variety of devices, including scanners, digital cameras, and even mobile phones.
OCR is used in a variety of applications, including document scanning, data entry, and machine translation. It is also used in some security applications, such as verifying the authenticity of documents.
OMR stands for Optical Mark Recognition. It is a technology that reads marks made on paper, such as those made by a pencil or pen. OMR is used in a variety of applications, including test scoring, surveys, and ballots.
MICR stands for Magnetic Ink Character Recognition. It is a technology that reads characters that are printed with magnetic ink. MICR is used in a variety of applications, including check processing and bank statement processing.
While OMR and MICR can be used to input printed text, they are not as versatile as OCR. OCR can be used to input text from a variety of sources, including paper documents, digital images, and even handwritten text.
Therefore, the correct answer to the question is: A. OCR